Highest temperature in Seoul on July 16?

Platform comparison

Market context

Seoul will experience its peak daytime heat on 16 July 2026, measured specifically at the Incheon International Airport Station, with the market resolving to the Celsius range containing that highest reading. Historical patterns for mid-July in South Korea show average highs between 25–30°C, often nudging 30°C during humid spells, while cooler rainy intervals can briefly drop temperatures to around 18°C[2][3]. The current crowd-implied probability of 0% for the YES outcome suggests traders expect the temperature to fall outside the specific range offered, likely aligning with the typical upper-20s anchor of 27°C rather than an extreme outlier[3].

Traders should monitor the monsoon schedule and real-time humidity reports, as July is South Korea’s wettest month with humidity frequently exceeding 80%, which directly influences peak temperature readings[2]. Unlike Kalshi or Betfair, which often use decimal odds and stricter KYC gates, Polymarket displays outcomes as implied probabilities and operates with a lighter verification model, creating divergent liquidity dynamics on weather events like this[1]. Smarkets, by contrast, charges a commission on winnings rather than embedding fees in the spread, a structural difference that affects how traders price the 0% probability against historical volatility in Seoul’s summer climate.

Sources: 1 · 2 · 3

Methodology

This page compares Highest temperature in Seoul on July 16? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.